I priced other 50ft and 75ft slip n slides on Amazon and the cost was ridiculous considering what you actually got. A lot of the reviews said things like "just a thick roll of plastic". So it got me thinking. You can buy 100 ft. sheet plastic at Lowes and Home Depot for a lot less. And I'll be posting the DIY foam machine next week if you're interested in that. See the combined fun in the video below.
I also recommend getting at least 10 feet wide. That also may sound too wide. I know traditional slip n slides are barely 24" but you'll be surprised how much you slide around on that 10 ft especially if multiple kids are going at once.
For this beach slide I only brought the 50ft piece. You'd be surprised just how heavy 50ft of plastic can be. We had to cart it to the beach in a wagon. A lower mil plastic will be lighter so maybe if you want to cart this to the beach you could try a lighter plastic (like 4 mil) but don't be surprised if you get a few tears.
Here are the thickness and length pricing options:
25ft x 10ft 6 mil clear plastic Home Depot $24.98
100ft x 10ft 6 mil clear plastic Home Depot $59.98
50ft x 8ft 4 mil clear plastic Home Depot $16.97
100ft x 10ft 4 mil clear plastic Home Depot $43.98
25ft x 10 ft 3.5 mil clear plastic Home Depot $10.98
25ft x 10ft 6 mil clear plastic Lowes $24.98
100ft x 10ft 6 mil clear plastic Lowes $59.98
25ft x 10ft 4 mil clear plastic Lowes $11.47
100ft x 10ft 4 mil clear plastic Lowes $43.98
100ft x 12ft 4 mil clear plastic Lowes $45.98
25ft x 10ft 3 mil clear plastic Lowes $11.48